P0017: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)
P0017 means Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B). The crankshaft and camshaft position signals no longer line up the way the engine computer expects for bank 1 (the side with cylinder 1), camshaft sensor "B". In other words, the camshaft is out of phase with the crankshaft.
Can I keep driving? Limit driving and diagnose promptly. Continued driving can cause damage, stalling or limp mode.
Common symptoms
- Check engine light on
- Hard starting or long cranking
- Rattle from the timing chain area, often at start-up
- Rough running, misfires or reduced power
- Engine may stall
Possible causes
- Stretched timing chain or worn chain guides/tensioner
- Timing belt or chain that has jumped a tooth
- Camshaft phaser stuck or faulty
- Faulty crankshaft or camshaft position sensor, or a damaged tone ring
- Incorrect timing after belt/chain replacement
How to diagnose P0017
- Check oil level and condition; low oil pressure affects chain tensioners and phasers.
- Look at cam/crank correlation values on a scan tool if supported.
- Inspect sensors, connectors and tone rings.
- Verify mechanical timing marks against the service manual procedure.
- If the chain is stretched beyond spec, replace chain, guides and tensioner as a set.
On interference engines, a jumped belt or chain can let the valves hit the pistons. If you hear new noises from the timing area, stop driving and have it inspected.
What the code means, digit by digit
Generic codes have the same definition on every OBD-II vehicle (petrol cars from model year 1996 in the US, 2001 in the EU; diesels later). Manufacturers can add their own enhanced codes; those are not listed here.
Related codes
General guidance only. Fault codes describe what the engine computer saw, not which part failed: confirm with testing before replacing parts, and follow the vehicle's service information.